Watch pool mint event. (#125)

packages/uni-watcher/src/indexer.ts

@@ -164,6 +164,21 @@ export class Indexer {
               const { sqrtPriceX96, tick } = logDescription.args;
               eventProps = { sqrtPriceX96: sqrtPriceX96.toString(), tick };
 
+              break;
+            }
+            case 'Mint': {
+              eventName = logDescription.name;
+              const { sender, owner, tickLower, tickUpper, amount, amount0, amount1 } = logDescription.args;
+              eventProps = {
+                sender,
+                owner,
+                tickLower,
+                tickUpper,
+                amount: amount.toString(),
+                amount0: amount0.toString(),
+                amount1: amount1.toString()
+              };
+
               break;
             }
           }

packages/uniswap/hardhat.config.ts

@@ -7,6 +7,7 @@ import './tasks/deploy-factory';
 import './tasks/deploy-token';
 import './tasks/create-pool';
 import './tasks/initialize-pool';
+import './tasks/mint-pool';
 
 const config: HardhatUserConfig = {
   solidity: "0.8.0",

packages/uniswap/package.json

@@ -9,7 +9,8 @@
     "deploy:factory": "hardhat deploy-factory",
     "deploy:token": "hardhat deploy-token",
     "create:pool": "hardhat create-pool",
-    "initialize:pool": "hardhat initialize-pool"
+    "initialize:pool": "hardhat initialize-pool",
+    "mint:pool": "hardhat mint-pool"
   },
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "^2.0.2",

packages/uniswap/tasks/mint-pool.ts

@@ -0,0 +1,46 @@
+import { task, types } from "hardhat/config";
+import {
+  abi as POOL_ABI,
+} from '@uniswap/v3-core/artifacts/contracts/UniswapV3Pool.sol/UniswapV3Pool.json'
+import {
+  abi as ERC20_ABI
+} from '@uniswap/v3-core/artifacts/contracts/interfaces/IERC20Minimal.sol/IERC20Minimal.json';
+
+import { ContractTransaction } from "ethers";
+import '@nomiclabs/hardhat-ethers';
+
+const getMinTick = (tickSpacing: number) => Math.ceil(-887272 / tickSpacing) * tickSpacing;
+const getMaxTick = (tickSpacing: number) => Math.floor(887272 / tickSpacing) * tickSpacing;
+
+const APPROVE_AMOUNT = BigInt(1000000000000000000);
+
+task("mint-pool", "Adds liquidity for the given position to the pool")
+  .addParam('pool', 'Address of pool contract', undefined, types.string)
+  .addParam('recipient', 'Address for which the liquidity will be created', undefined, types.string)
+  .addParam('tickLower', 'Lower tick of the position in which to add liquidity', undefined, types.string)
+  .addParam('tickUpper', 'Upper tick of the position in which to add liquidity', undefined, types.string)
+  .addParam('amount', 'Amount of liquidity to mint', undefined, types.string)
+  .setAction(async (args, hre) => {
+    const { pool: poolAddress, recipient, tickLower, tickUpper, amount } = args
+    const [signer] = await hre.ethers.getSigners();
+
+    const pool = new hre.ethers.Contract(poolAddress, POOL_ABI, signer);
+    const token0Address = await pool.token0();
+    const token1Address = await pool.token1();
+    const tickSpacing = await pool.tickSpacing();
+
+    console.log(token0Address, token1Address, tickSpacing, getMinTick(tickSpacing), getMaxTick(tickSpacing));
+
+    const token0 = new hre.ethers.Contract(token0Address, ERC20_ABI, signer);
+    const token1 = new hre.ethers.Contract(token1Address, ERC20_ABI, signer);
+
+    const t0 = await token0.approve(poolAddress, APPROVE_AMOUNT);
+    await t0.wait();
+
+    const t1 = await token1.approve(poolAddress, APPROVE_AMOUNT);
+    await t1.wait();
+
+    const transaction: ContractTransaction = await pool.mint(recipient, BigInt(tickLower), BigInt(tickUpper), BigInt(amount), '0x00');
+    const receipt = await transaction.wait();
+    console.log(JSON.stringify(receipt));
+  });

packages/uniswap/tsconfig.json

@@ -70,6 +70,6 @@
     "forceConsistentCasingInFileNames": true,       /* Disallow inconsistently-cased references to the same file. */
     "resolveJsonModule": true
   },
-  "include": ["src/**/*"],
+  "include": ["src/**/*", "tasks/*"],
   "exclude": ["src/**/*.test.ts"]
 }